Our Remote IO are racks and modules that are directly connected by cables to the rack that contains the PLC processor. By using multiconductor (parallel) cables, the data throughput is very high and secure. Data, configuration and diagnostic information are “automatically” available. Data does not have to “packaged” into a serial protocol for sending to the I/O. Distributed I/O are racks and modules that are connected by some communication protocol over a communications cable. Modbus, Modbus Plus, Modbus TCP/IP, Profibus etc. This type of I/O often does not provide as much information back to the processor because all the information, including diagnostics, must be “packaged” into the sent/received commands.